charging regulator

[Bill_in_USA]

I have been reading the thread, and I have the same problem with my 1984 Merc 50HP outboard. Determined the rectifier was bad, bought a new one, installed it and the battery is charging upwards of 16.5 v with a charge current of 6 to 8 amps. Is there an after market regulator available? I can make one if I had a circuit diagram.
Thanks,
Bill

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[Talbot]

talk to barden batteries, They have some regulators which might well do the trick.

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[silverseal]

Is the voltage measured with the battery connected, or just floating and measured by a meter? If the latter, you must measure the voltage with battery connected.. then make a decision

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[Bill_in_USA]

The 16 volts is with the battery connected to the rectifier as is the charging current.

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[andy01842]

16.5v into a 12v battery and only 6 to 8 amps. Think you may need a new battery.

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[Bill_in_USA]

The battery voltage is around 12 volts when the motor is not running. As I increase the RPM, the voltage rises slowly to 16.5. I assume the high voltage from the rectifier is causing the battery to form gas around the plates and the terminal voltage then rises. I want to build or buy a regulator to correct this problem.

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[halcyon]

If the battery is at 12 volt with no load, then as a guide devide capacity by charge rate, and this should be approximatley the time it takes to get the battery to 16 volt.
If it is taking you say 15 / 30 minutes to reach 16 volt, you have a dead battery that is sulphated and you are getting surface charge. In which case you may find the charging ok, or you do not get over charge in normal use.

Brian

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